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Finding the Fourth Proportional to 1,429,537.82, 1,972,939.88 and 817,605.70

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Solution

The fourth proportional to 1,429,537.82, 1,972,939.88 and 817,605.70 is: 1,128,397.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429,537.82 : 1,972,939.88 = 817,605.70 : x
  2. Step 2: Convert to fraction form
    1,429,537.82/1,972,939.88 = 817,605.70/x
  3. Step 3: Cross multiply
    1,429,537.82x = 1,972,939.88 × 817,605.70
  4. Step 4: Simplify right side
    1,429,537.82x = 1,613,086,888,756.98
  5. Step 5: Solve for x
    x = 1,613,086,888,756.98/1,429,537.82
  6. Step 6: Final answer
    x = 1,128,397.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.